Sandal upper



FIG. 1 is a perspective view of the sandal upper embodying the new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a left side elevational view thereof; and,

FIG. 6 is a right side elevational view thereof.

The broken lines showing the sole in the figures is for illustrative purposes only and forms no part of the claimed design. The surfaces that are not shown form no part of the claimed design.

The broken lines which define the bounds of the claimed design form no part thereof. 

The ornamental design for sandal upper, as shown and described. 